Exploring Missing Angles in Triangles

The video tutorial covers the properties of equilateral and isosceles triangles, focusing on their congruent sides and angles. It explains how to calculate the angles in these triangles and provides practice problems for students to solve. The tutorial also includes an assignment with additional problems to reinforce the concepts learned.

What is the measure of each angle in an equilateral triangle?

• 120 degrees

• 45 degrees

• 60 degrees

• 90 degrees

In an isosceles triangle, if two sides are congruent, which angles are congruent?

• None of the angles

• All three angles

• The angles opposite the congruent sides

• The angles adjacent to the congruent sides

If angle B in an isosceles triangle is 72 degrees, what is the measure of angle A?

• 72 degrees

• 144 degrees

• 36 degrees

• 108 degrees

In an isosceles triangle, if the two congruent angles are 43 degrees each, what is the measure of the third angle?

• 43 degrees

• 180 degrees

• 86 degrees

• 94 degrees

If the non-congruent angle in an isosceles triangle is 46 degrees, what is the measure of each of the congruent angles?

• 67 degrees

• 46 degrees

• 134 degrees

• 92 degrees

In a right triangle, if one of the acute angles is 37 degrees, what is the measure of the other acute angle?

• 143 degrees

• 90 degrees

• 53 degrees

• 37 degrees

Which of the following sets of angle measures can form a triangle?

• All of the above

• 60, 60, 60

• 45, 45, 90

• 90, 45, 45

If angle P in an isosceles triangle PQR is 72 degrees, what is the measure of angle Q?

• 144 degrees

• 108 degrees

• 72 degrees

• 36 degrees

In an isosceles triangle ABC, if angle A is 48 degrees, what is the measure of angle B?

• 48 degrees

• 66 degrees

• 96 degrees

• 132 degrees

Which expression would be used to find the missing angle in a triangle?

• angle1 + angle2

• angle1 - angle2

• 180 - (angle1 + angle2)

• 180 + (angle1 + angle2)